Synchronizing device for paper machines



Feb, 23, 1932. w. VOGEL 1,846,770

SYNCHRONIZING DEVICE FOR PAPER MACHINES Filed Aug. 14, 1930 2 Sheets-Sheet l 1 Feb. 23, 1932.

W. VOGEL SYNCHRONIZING DEVICE FOR PAPER MACHINES Filed Aug. 14, 1930 2 Sheets-Sheet 2 Patented Feb. 23, 1932 UNITED STATES PATENT OFFICE WALTER VOGEL, OF ZURICH, SWITZERLAND, ASSIGNOR TO THE FIRM AK'IIENGESELL- SCEAIT DER MASCHINENFABMKEN ESCHER WYSS & CIE, OF ZURICH, SWITZER- SYNCHRONIZING DEVICE FOR. PAPER MACHINES Application flied August 14, 1930, Serial No.

I This invention relates to arrangements for influencing the controlling speed and, therethe sensitiveness of regulation of the speed synchronizing device of a machine, particularly a paper machine, having a plurality of shafts that are interconnected by regulating mechanisms and either driven separately. or-

in groups.

It is necessary, particularly in connection with so-called fine paper machines, i. e. ma-

chines for the production of quality paper to "for the regulation of the s eed of the difprovide for speed variation in wide limits. Thereby these speeds must be changed very often. Thus, when such machines are provided with a speed synchronizing device, i. e. a device for keeping the speed ratio of a plurality of shafts constant with respect to a certain shaft, a drawback arises due to the sensitiveness of the said speed synchronizing device at high working speeds of the machine being substantially greater than at low speeds. L

.The object of the invention is to provide a simple device which is safe in operation and which permits of adapting the controlling the sensitiveness of regulation of the speed synchronizing device to the momentary workin speed of the machine under utmost utihzation of the means that are in any case required for the drive and speed and, thereby,

ferent rolls. For attainingt is result according to the invention the magnitude of the control or comparative speed of the speed synchronizing device is rendered variable independentl of the s eed of the machine, and adjustab e regulating means are provided which when said control speed is chan ed ermit of adjusting the ratio of transmission tween the working speed of the machine and that of said control speedto the required value.

In the drawings several constructional forms of the invention are schematically i1.- lustrated, by way of example only, wherein Fig. 1 shows a first constructional form in which a speed "synchronizing device of a paper 'machine, constructed as a shaft, is driven by a roll of the said machine;

Fig. 2 shows asecond constructional form,

475,362, and in Switzerland August 19, 1928.

whereby the speed synchronizing device con- .structed as a shaft, is driven by a separate source of power;

Fig. 3 shows a constructional form in which the frequency of a three phase network serves as a speed synchronizing means for a paper machine, and I Fig. 4 shows a modification ofthe arrangement illustrated in Fig. 3. 1

Referring to Fig. 1, the rolls of apaper machine which have to run at given speeds are designated by 1, 2, 3, 4 and 5. Everyone of the rolls 1, 2, 3 is driven from a separate motor 6, 7 and 8 respectively by the intermediary of the respective change speed gears 10, 11 and 12. The I'OllSfl and 5 on the other hand take their drive from a. common motor 9 by means of a change speed gear 13. The motors 6, 7, 8 and 9 are synchronized three phase motors connected with a common network 14. The secondary shaft 15 of each change speed gear 10, 11, 12, 13 drives by way of a two stage gear 16 and a single stage gear 17, the correlated rolls 1, 2, 3, and 4, 5 respectively. The intermediate shaft 18 of each two stage gear 16 actutates the driving part 20 of manually adjustable regulating gears 21, 22, 23 and 24 respectively by the aid of a chain drive 19. In Fig. 1 the driven part 20 of the regulating gear 22 is directly coupled with a shaft 25 to which a bevel gear wheel 26 is fixed. The latter is in mesh with a bevel gear wheel 27 on a control shaft 28 of a speed synchronizing device. Each of the driven parts 20 of the other regulatin gears 21, 23, 24, however, is rigidly connected to the bevel gear wheel 29 of a differential gear D. The differential gears D are component parts of the speed synchronizing oe vice and each of these gears is operatively connected by means of a chain drive 30 with an appliance 32 for varying the ratio of transmission of the correlated change speed gear 10, 12 or 13 respectively in amanner known per so. A further bevel gear wheel 33 of each differential gear D is rigidly connect ed to a shaft 34. Each shaft 34 carries a bevel gear wheel 35 meshing with a bevel gear wheel 36. on the control shaft 28. n An auxiliary motor 37 operatively associated with the appliance 32 for varying the ratio of transmission of the change speed gear 11 serves together with the speed synchronizing device for varying the so called meanspeed of the entity of rolls 1, 2, 3, 4 and 5 simultaheously a certain amount.

The operation of the arrangement shown in Fig. 1 is as follows: The desired ratio between the speeds of the motors 6, 7, 8 and 9 and the rolls 1, 2, 3, 4 and 5 respectively of the paper machine correlated thereto is effected with the aid of the respective change speed gears 10,11, 12 and 13. Thereby, also the regulating gears 21, 22, 23 and 24 must be so adjusted that the bevel gear wheels 29, 33 of the individual difierential gears D run at the same number of revolutions in opposite direction to each other, so that the ad usting appliances 32 of the change speed gears 10, 12 and 13 during the normal run of the machine are not actuated by the differential gears D.

If any deviation of the speed of anyone of the rolls 1, 3-or 4, 5 of the paper machine from the properspeed occurs, then at first an immediate change of the speed of the intermediate shaft 18 arranged to operate in conjunction with that pai'ticular roll of the machine is caused, whereby the differential gears D and the appliances 32 operatively connected therewith are influenced suchwise as to keep the ratio between the speed of the roll 2 and the speeds of the rolls 1, 3 and 4, 5 constant. As soon as theratio to be maintained between the speeds of the rolls 1,2, 3 and 4, 5 is re-adjusted the control shaft 28 again only operates so as to maintain constant the new speeds that have been automatically brought to the proper value in the above described manner. 7

The manually adjustable regulating gears 21, 23, 24 permit of varying the speeds of the rollsl, 3, and 4, 5 associated therewith (regulation of the draws). As regards the roll 2 in the shown arrangement a regulation of the draw thereof is not necessary. The regulating gear 22 provided in connection with the roll 2, however, permits of altering the control or comparative speed of the control shaft 28, i. e. the speed of the shaft 25 independently of the speed of the machine, in order to enable the speed of the shaft 28 and thus the sensitiveness of regulation to be adapted to the momentary working speed of the paper machine. Thereby, in every case the other regulating gears 21, 23, 24 must be soadjusted that in spite of the respective increase or decrease of the speed of the control shaft 28 caused by the adjustment of the regulating gear 22 the speeds ofthe rolls 1, 3 and 4,

5 of the paper machine are prevented from deviating from the proper speed that is to say that the ratio of transmission between the working speed of the machine and the speed of the shafts 25 and 28 respectively is adjusted to the re uired new value.

It is an essentlal condition for the applicability of the described device that the individual gears 21, 23, 24 are regulatable within relatively wide limits, as these gears, besides possessing the necessary regulating range for the draws, are required to be provided with an additional regulating range for.

influencing the speed of the control shaft 28. Besides this condition the invention is not limited to any particular construction of the regulating gears 21, 23, 24.

Instead of the control shaft 28 being driv- I en by the roll 2, in the manner illustrated, the.

said shaft may take its drive, as shown in Fig. 2, from a separate source of power 40 by the intermediary of a regulating gear 41. In this case also for shaft 25 a difierential gear D is provided and the adjustable regulating gear 42 then operates in exactly the same manner, as the regulating gears 43, 44, 45. Otherwise the constructional form shown in Fig. 2 corresponds to that illustrated in Fig. 1, wherefore in Fig. 2 a number of parts are omitted.

As shown in Fig. 3, instead of the control shaft 28, the frequency of a three phase network 50 may be used as a speed synchronizmg means. In the said Fig. 3 the reference numeral 51 designates a prime mover which is supplied with current from the main line 14 and which by means of an adjustable gearing 52 actuates a generator 53 which feeds current to the network 50. In place of the mechanical difierential gears D in Fig. 1 electrical differential means E are provided in,

this case for the same purpose. These means substantially consist of a part cooperating with the network 50 and a part which is infiuenced by the rolls 2, 3 or 4,5 of the paper machine by the intermediary of the regulating gears 22, 23 and 24 respectively. The difference of the influences arising from the network 50 and the rolls 2, 3, 4 acts on the speed controlling means of the main gearings 11, 12, 13 in known manner. To enable the regulating gears 22, 23,24 which are intended for the regulation of the draws also to be used for influencing the sensitiveness of regulation, their regulating range, besides bemg adapted to the regulation of the draws, must be increasable to such an extent as to allow For simplifying the attendance of an arrangement as shown in Fig. 3, a lay-out such as shown in Fig. 4 is used with advantage. In this latter case in order to permit the re-adjustment, from one single point, of

p the regulating gears 22, 23, 24, as required aswell as a simultaneous actuation of the entity of control motors G, 60, 61 and 62. Current is fed to the switch boxes a, b, 0,v g from the conductors 55 through connecting wires 63. With the aid of the switch box 9 the sensitiveness of regulation of the machine can be varied by a single adjustment Without the speed of the individual rolls 2, 3, 4 being changed. By individual operation of the switch boxes a, b, 0 on the other hand the speed of each roll 2, 3 and 4 respectively can be separately influenced (regulation of the draws) whilst by individual operation of the control motor G the speed of the entire machine (mean speed) can be changed.

The described device is adapted for use not only in conjunction with paper machines, but in all cases where the control speed of the speed synchronizing device of a machine comprising a plurality of shafts interconthe nected by regulating mechanisms and either driven separately or in groups, as for mercerizing machines, rotary printing presses and the like, must be varied.

' I claim 1. In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts, a motor for each shaft, a change speed mechanism between'the motor and the shaft, a. speed synchronizing device generating a control speed, means for varying the control speed of said speed synchronizing device independently of the speed of the machine, and adjustable regulating means permitting of adjusting the ratio of transmission between the working speed of the machine and said control speed to the required new value when said control speed is changed.

2. In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper magroup of shafts, a change speed gear between motor and the group of shafts, a speed synchronizing device generating a control speed, means for varying the control s ed of said speed synchronizing device incib pendently of the speed of the machine, and adj ustable regulating means permitting of adjusting the ratio of transmission between the working speed of the machine and said control speed to the required new value when said control speed is changed.

3. In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts, a motor for each shaft, a change 5 eed mechanism between the motor a speed. synchronizing device generating a. control speed, a regulating mechanism, a mechanical interconnection between said regu lating mechanism and said speed synchronizing device for varying said control speed independently of the speed of the machine, and adlustable regulating means permitting of adjusting the ratio of transmission'between the working speed of the machine and said control speed to the required new value when said control speed is changed.

4. In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts, a motor for each shaft, a change speed gear between the motor and the shaft, a speed synchronizing device generating a control speed, a prime mover, a generator, an electrical network connected to said generator to provide a speed synchronizing device, an adustable mechanism between said prime mover and said enerator for influencing the frequency of said speed synchronizing device by changing the control speed of said enerator independentl of the speed of the machine, and adjustab e regulating means permitting of adjusting the ratio of transmission between the working speed of the machine and said frequency to the required new value when said control s eed is changed.

5. In an arrangement f dr influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts. a motor for each shaft, a. change speed gear between the motor and the shaft, 8. speed synchronizing device generating a control speed, means for varying said control speed independently of the speed of the machine, and adjustable regulating gear, and a cor- .related differential gear provided for those shafts the ratio of which between their working speed and that of a certain other shaft is to be kept constant, said correlated gears permitting of adjusting the ratio of transmission between said working speeds and said control speed to the required new value when said control speed is changed.

6. In an arrangement for influencing the and the s raft,

control speed of the speed synchronizing decontrol speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts, a motor for each shaft, a change speed gear between the motor and the shaft, a speed synchronizing device generating a control speed, means for. varying said control speed independently of the speed of the machine, an adjustable regulating gear, and a correlated electrical difierential means for each shaft of the machine permitting of adjusting the ratio of transmissionbetween the working speed of the machine and said control sion between the working speed of the machine and said control speed to the required new value when said control speed is changed and also permitting a draw-adjustment of the correlated shafts of the machine.

8, In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shai ts arranged in groups, a motor for each group of shafts, a change speed gear between the motor and the group of shafts, a speed synchronizing device generating a control speed, means for varying said control speed independently of the speed of the machine, and adjustable regulating means permitting of adjusting the ratio of transmission b@-,

tween the working speed of the machine and said control speed to the required new value when said control speed is changed and also permitting a draw-adjustment of the correlated shafts of the machine.

9. In an arrangement for influencing the vice of a machine, particularly a paper ma chine, comprising a plurality of motor driven shafts, a motor for each shaft, a chan e speed gear between the motor and the sha a speed synchronizing device generating a. control speed, means for varying said control speed independently of the speedof the machine, adjustable regulating means permitting of adjusting the ratio of transmission between the working speed of the machine and said control speed to the required new value when said control speed is changed, and a control position from which the entity ed to be influenced.

10. In an arrangement for influencing the control speed of the speed synchronizing device of a machine, particularly a paper machine, comprising a plurality of motor driven shafts arranged in groups, a motor for each group of shafts, a change speed gear between the motor and the group of shafts, a speed synchronizing device generating a control speed, means for varying said control speed independently of the speed of the machine, adjustable regulating means permitting of adjustin the ratio or transmission between the wor g speed of the machine and said control speed to the required new value when said control speed is changed, and a control osition from which the entity of said adyustahle regulating means is adaptedto he influenced.

lln testimony whereof l have signed my name to this specification.

' WALTER VGGEL.

of said adjustable regulating means is adaptltd till 

